Locomotive-boiler furnace.



C. B. MOORE.

LOCOMOTIVE BOILER FURNACE.

APPLICATION HLED DECJBMBH.

1,138,047. Patented May 4, 19. 5.

[1206/2 tor Vii/265565 Charles .Maore UNITED sTZ aTEs PATENT OFFICE;

CHARLES B. MOORE, OF EV'AEN'STON, ILLINOIS, ASSIQNOR, BY HESNE ASSIGNMENTS,

TO'AIEBICLN ARCH COMPANY, OF IIEW YORK, N. Y., A COBPOBATION 0F DELA- WARE.

vSpecification. of Letters Patent. v

LOCOHOTIVEBOIiAEB FURNACE.

Patented May 4, 1915.

Lune-non filed December 18, 1911. Serial m. scans.

T all whom it may concern Be it known thatl, CHARLES B. Moons, a citizen of the United States, and a resident of the city of Evanston, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Locomotive-Boiler Furnaces, of which the followinitis a specification.

y invention relates to improvements 1n locomotive boiler furnaces and has special reference to improvements in refractory baffies or deflecting walls, commonly called arches, for, the fireboxes of locomotive boilers.v

The general objects of my invention are to provide an im roved refractory arch which may be easi y and quickly installed in locomotive fireboxesfto provide an arch which shall .be of comparatively light weight and low cost to provide an arch which shall be adapted for easy repair 'and parts of which can be removed to afford easy access to the firebox sides and flue sheet; and to provide an arch of a form that will materially assist in admixing and i iting the firebox g'ase's and othercombusti les.

A special object of my invention is to rovide an improved arch of the character ere outlined which shall be adapted for use incation, and in which:

locomotive fireboxes that are equipped withv arch supporting tubes, the arch itself being so constructed, formed and proportioned, that the unequal abrasive act on to whicharches of this character are sub' cted in their different parts is compeiisiitd for and consequently the arches are of substantially equal life throughout their extent.

My invention consists in the several im provements, the various constructions and the combinations of parts by. which these objects are attained, together with others appearing herein and allas hereinafter fully described and particularly pointed out in the appended claims.

My invention will be more readily understood by reference to the. accompanying drawings, forming a part of this specifi- Figure 1 is a centralw'ertical longitudinal section of a locomotive boiler firebox equipped with a refractory arch embodying my invention; Fig. 2 is a horizontal section v o the firebox on the line 2 -2 of Fig. 1; 3 is a vertical transverse section of the firebox on the line 33 of F ig. 1; Figs.

illustration of the invention to so-called refractory front arches which extend from side to side in the firebox and practically abut the firebox flue sheet, I desire that it shall be understood that my invention is .not confined or limited to this specific form of arch.

A locomotive boiler firebox, as illustrated in the drawings, is made up of a fiuesheet 2,

side sheets 33, a rear sheet 4-and a crown sheet 5. The firebox is equip d as usual with a grate 6, the flues 7 lead f d rward from the fine sheet and the rear sheet is 1'0- vided with a fuel door or, opening 8. he firebox shown in the drawings is equipped with a pair. of circulatin tubes 9, the same extending upwardly an 'reatrwardly from the lower part of the flue sheet'to the upper part of the rear sheet and serving to increase the circulation of water between the front and rear water legs of the boiler. These tubes 9 extend substantially parallel with the side sheets 3 and are comparatively widely separated.

A so-called front arch usually occupies an inclined position in' the forward end of the firebox extending from side sheet to side sheet, its lower end being in abutment with or close to the flue sheet. such arches is to deflect the firebox gases out of the direct path from the grate to the fines and cause them not only to be retained in the firebox a longer time than would otherwise occur,-blft also to pass or flow backward" and forward through the fire- The function of i box and thus distribute the heat of the burning gases .to the whole interior surface of whole length of the crown sheet.

of this character, especially where they are made of comparatively thin.v members,"

bles. The arch being in the path 'of'the;

rising gases is effective to return to the fuel bed, the cinders and the solid fuel particles the firebox and especially throughout the i Arches than upon others, and s particular feature of my invention is to provide an arch structure varied in thickness in its various aris for the purpose of providing sgsinsl; this unequal abrasive or SCOHXlI lg action whereby lilie arch. is of siibstzintially eql'izzl life. throughoui its extent. in other words, my ohgect is to provide an arch strucure which will better perform the main functions of arches of this character in deflecting, cominingling, admixing and igniting the firebox gases and whi will in a practical sense prevent; one part of the arch from wearing out in advance of ti llfihllel. pert. To this end I build my ere-lies of a number of refractory parts so disposed or: arranged us to present :1 large superficial si es or ignismg surface composed. of portions which are inclined at various angles to other and the arch body itself being reinforced, thickened or proportioned in thickness to the abrasive action to which it is subjected in use. In carrying out my invention l employ a considerable number of independent bricks usually of several difi'erenl; forms or shapes and assemble thorn in s tosecure shese advent-ages and. others herein mentioned. A special feature of niv invention resides in an inclined front arch biiilt or composed of two kinds or forms of brickgfihzit supporting and pauclbricksl'; The supporting bricks are supported by tlieQ tuheS 911ml are arranged in pairs, resting at their lower ends upon and againsc said tubes andiubutting at their upper ends suhstintially niiclor cover bricks as well. I prefer to make these bricks substantially as wide as she are iliiclc and they are of necessity made long enough so that a pair of them will properly span the tubes, The panel or cover bricks, however, not. having to'sustain any weight, except their own, can be made lioah thin angl light and I prefer to make them as light as possible so that the arch as e whole will not be too heavy to be sustsinedfib safely upon the tubes.

"f eing made up of smell units my arches can be readily and quickly installedwith minimum expenditure of time and ,lnboiz" Another inherent feature in my imggroved, 86

arches tliz'it they are in a practical sense ir-"zble, lhat is, being formed of individual members, -ihcjoints between which are overlap-peel and protected. against the cementing act-ion of the slag which is formed. upon such 3 ends With-sockets or grooves of zulapting their: to rcsc against and upon the-tubes 9,

and at their upper ends with compleuleiilzary' interlocking tongues a and grooves '6". whereby the abutting ends arc from relative longitudinal movement once they have been posltionedl teuiperw spun" bricks a which are provided on their l 1 Werprevenfed mid vcrticsll These spans are spaced, apart upon'th tuoes at different heights'und. are retained in spaced relation by the cover or panel b'riclis 1'05; b. a The panel bucks I are prefera-bly' interposed between the upper edges of the poriing bricks a,'Wl11Cl1 are provided with way between the tubes, thereby forming -efractory selflsupporcing spans or arches be tween the tubes. 1 provide two or inore of these self supporting spins spaced spare upon the tubes and retain them' in spaced relation by means of the cover or panel lbricks which rest uponand extend between adjacent spans and practically and substantiully close the openings between them. The various bricks oi the zlICliZLIElll'llltOd in size by the features tlmtvthcy should be light enough to be readily handled and placed in 11 osition and should be small enough to be readily passed through the fire door or opening 8. It is desirable, however, that they be as large 'as these festureswill per mic to the end that as few possible of the individual bricks will be necessary to build the arch. The oi the supporting bricks is determined by their length and the weight of the arch, these bricks sustaining not only their own weight but the weight of the panel grooves or gains a to receive the flange 5' of the bricks-b. It Willnow be. seen that 9 irrespective of the shape or contour of the uppersurface of the arch, the lower or incle'i surface presents a. pluralityof' gas deflecting" cavities, pockets and w; lls arranged at vairious angles and having different climcnsions. The cover or panel bricks Z, being arranged between the upper edges, of the supporting bricks, are protected to some extent from the scouring or iibrs'sive action of the cinders or fuel particles carried up no ward by the firebox gases, but ihe geses.

on account of their deflection by lhearch; flow upwardly along the under surface of the arch, the upper ends of the cover '05 panehbriclis are exposed to s much eavier" or greater abrasive act-ion than thmbwer ends and for this reason I thicker; or reinforce the upper ends 5 of the cover bricks a, as shown in thevdrawings, to provide against; this excessive Wear. The added thickness of the; cover bricks 3) provides upper ends w 'chhbut the lower side face oi the supporting bricks and aids in retaining the supporting bricks in position. This ffnrmationpcf the panel bricks provides one end of them with a socket or groove 5 and tocomplete the -arch I place a-nurnber of these panel or cover bricks between the tubes and respectiye side sheets of the firebox, placing the socketedends of these bricks upon the tubes and leanin the bricks in Qinclined position agaihst e' side sheets. @The arch as" thus constructed is formed of but two forms or patterns of bricks,- congsequcntly. the archisran'economical one to {install and maintain for the reason that it is gnecessary to carry but these two forms of brickin stock at convenient points, and an arch constructed as herein defined may properly be termed a two-brick arch in that but two forms or patterns of brick are used 'in its construction' The bricks a being comparatively lorig and consequently quite heavy, I preferably lighten them to as great an extent as possible by providing them with cavities a upon their under surfaces. These caviti s extend substantially the whole length of the bricks and provide them with comparatively thin marginal edges a and thus not only'reduce the weight-cl the bricks but the cavities add to the eflicicncy of the archin its function of admixing the firebox similar leaf or panel or against the adjacent gases while the thin marginof edges aid in the ignition thereof. Andfdrther, I preferably make these supporting bricks tapered in thichess from their upper to their lower ends, first to decrease their weight as much as possible andsecond for the purpose ofmaking them thicker at their upper ends where they are naturally exposed to the greatest abrasive wear.

In installing my improved arches in locomotive fire-boxes, I place a pair of the span bricks upon the lower ends of the tubes 9 and in abutment with the flue sheet, interlocking their abutting ends together. As

they rest upon the tubes 9, which are inclined to the flue sheet, their lower ends are spaced from the flue sheet and I retain their lower ends thus spaced by means of spacing blocks or bricks c which are formed to conform \on their lower sides to the tubes upon which they rest and are retained in position-between the arch and the line sheet by thewvsi ht of the arch which rests against them e openings-or spaces thus formed between the lower end of the arch and the hue sheet serve to permit the cinders which fall upon the back of the arch to return to thefuei bed. Having the first s an in positioh lplace a similar span para lel with the I first and higher up on the tubes and retain it in, position by means of a number of the ease: or panel bricks? which I place bebctween the supporting bricks and they are adding further spans and rows of spacing might consist of but two parallel spans and thhm wiflr de ending'shoulders b at their fer to use two of the cover bricks between each two-adjacent supporting bricks. As shown in'Fig. 5, the cover bricks depend 70 retained in position transversely of the firebox by the tubes 9 against which the lowermost of said cover bricks rest. The main or central portion of the arch is completed by or cover bricks to build the arch of the desired length or height. Usually the arch extends rearwardly to about the center of the firebox, although in some instances t an intermediate row of the cover bricks. -I. complete the arch as a whole by filling in. between the side edges of the center portion' of the arch and the side sheets b' placing a number of the panel or cover ricks b in 86 position upon the tubes 9 and resting against the side sheets 3. These side bricks not only complete the arch but in a practical sense I lock the whole arch against lateral move ment in the firebox as they arepreferably '99 of such a length that they wedgingly rest or engage the tubes and the side sheets upon which they are supported.

It will now be understood that a front arch as herein defined comprises a plurality of 9;

leaves or panels arranged longitudinally in the firebox, restingat one edge upon a cir-" culating tube and leaning either against a of these leaves or panels which are exposed to the most excessive wearing effect of the cinders are reinforced or t 'ckened. i

As many modificatlons o my Invention will readily suggest themselves to those skilled in the art, I do not limit my invention to the s -ecific structures herein shown and describe Having thus described my invention I claim as new and desire to secure by letters Patcnt:

LA locomotive boiler firebox containing two circulating tubes, in combination with a vrefractory front arch therein extendin from side to side and in abutment with the flue sheet composed of two forms bf bricks and comprising a plurality of two-brick spans spaced apart on the tubes, thefbricks of the spans being all of the same form and thickest at their upper ends, an alternate series of filling or panel bricks arranged between said spans spacing them apart and n filling the openings between them, the upper end of said panels also beingthicker than their lower ends, and a series of bricks identical with snirl panel bricks arranged between each tube and the adjacent side sheetand serving to complete the arch, substantially as =scrilied.

2. A locomotive boiler firebox containing two comparatively widely separated, substantially parallel inclined circulating tubes, in combination with a twobr'el refractory front arch coinprisin a plurality of parallel, self-supporting spans, each composed of two identical, tapered supporting bricks, their thinner ends resting upon and against respective tubes, and their thicker ends abutting each other in interlocked engagement said spans being spaced apart upon the tubes, a plurality of identical tzipered panel bricks arranged between and spacing said spans and a plurality of similar tapered panel or filling bricks arranged in each side of the firebox resting on and against a luhe and wedginglyenguging the respective side sheet, substantially as dc scribed. e

In testimony whereof, I have hereunto set my hand, this 5th day of December, 1911, in the presence of two subscribing witnesses,

CHARLES B. MOORE.

\Vitnesses CHARLES GILBERT I'IAWLEY, EDWARD F. VVILsoN. 

